Data availability was uneven across years, so we separated the data into 5 smaller datasets. Datasets 1-4 include all data points for each year, so variables with missing values were left out. The fifth dataset contains only points for which all variables were measured, so it is smaller. Please see Data_Key .docx file for numbers used to indicate location and year within datasets.
\n\n| Model Framework | \n\t\t\tVariables Included | \n\t\t\tCollection Year(s) | \n\t\t
|---|---|---|
| 1 | \n\t\t\tdepth, temp, salinity, dist. to river mouth, calves (binary), year | \n\t\t\t2008, 2009, Jan. 2012, Apr.-May 2012, Jan.-Feb. 2013, Jan.-Feb. 2014 | \n\t\t
| 2 | \n\t\t\tdepth, temp, salinity, turbidity, dist. to river mouth, calves, year | \n\t\t\t2009, Jan. 2012, Apr.-May 2012, Jan.-Feb. 2013, Jan.-Feb. 2014\u00a0 | \n\t\t
| 3 | \n\t\t\tdepth, temp, salinity, turbidity, chl\u00a0a, dist. to river mouth, calves | \n\t\t\tJan.-Feb. 2013, Jan.-Feb. 2014 | \n\t\t
| 4 | \n\t\t\tdepth, temp, salinity, turbidity, chl\u00a0a, pH, dist. to river mouth, calves | \n\t\t\tJan.-Feb. 2014 | \n\t\t
| 5 | \n\t\t\tdepth, temp, salinity, turbidity, dist. to river mouth, calves, year | \n\t\t\t2008, 2009, Jan. 2012, Apr.-May 2012, Jan.-Feb. 2013, Jan.-Feb.2014 | \n\t\t
\u00a0
\nFunding provided by: Ocean Park Conservation Foundation, Hong Kong
Crossref Funder Registry ID: http://dx.doi.org/10.13039/501100012693
Award Number:
Funding provided by: Indo-Pacific Cetacean Foundation
Crossref Funder Registry ID:
Award Number:
Funding provided by: National Geographic Society
Crossref Funder Registry ID: http://dx.doi.org/10.13039/100006363
Award Number: C232-12
Funding provided by: National Geographic Society
Crossref Funder Registry ID: http://dx.doi.org/10.13039/100006363
Award Number: C264-13
Funding provided by: Dr. Earl H. Myers and Ethel M. Myers Oceanographic and Marine Biology Trust
Crossref Funder Registry ID: http://dx.doi.org/10.13039/100017907
Award Number:
Funding provided by: Ecology and Evolutionary Biology Department, University of California, Santa Cruz
Crossref Funder Registry ID:
Award Number:
Aim: The Irrawaddy dolphin (Orcaella brevirostris) is an endangered cetacean found throughout Southeast Asia. The main threat to this species is human encroachment, led by entanglement in fishing gear. Information on this data-poor species' ecology and habitat use is needed to effectively inform spatial management.
\n\nLocation: We investigated the habitat of a previously unstudied group of Irrawaddy dolphins in the eastern Gulf of Thailand, between the villages of Laem Klat and Khlong Yai, in Trat Province. This location is important as government groups plan to establish a marine protected area.
\n\nMethods: We carried out boat-based visual line transect surveys with concurrent oceanographic measurements and used hurdle models to evaluate this species' patterns of habitat use in this area.
\n\nResults: Depth most strongly predicted dolphin presence, while temperature was a strong predictor of group size. The highest probability of dolphin presence occurred at around 10.0 m with an optimal depth range of 7.50 to 13.05 m. The greatest number of dolphins was predicted at 24.93oC with an optimal range between 24.93 and 25.31oC. Dolphins are most likely to occur in two primary locations, one large region in the center of the study area (11o54'18\"N to 11o59'23\"N) and a smaller region in the south (11o47'28\"N to 11o49'59\"N). Protections for this population will likely have the greatest chance of success in these two areas.
\n\nMain Conclusions: The results of this work can inform management strategies within the immediate study area by highlighting areas of high habitat use that should be considered for marine spatial planning measures, such as the creation of marine protected areas. Species distribution models for this species in Thailand can also assist conservation planning in other parts of the species' range by expanding our understanding of habitat preferences.
", "publication_date": "2021-01-06", "publisher": "Zenodo", "resource_type": { "id": "dataset", "title": { "de": "Datensatz", "en": "Dataset" } }, "rights": [ { "description": { "en": "CC0 waives copyright interest in a work you've created and dedicates it to the world-wide public domain. Use CC0 to opt out of copyright entirely and ensure your work has the widest reach." }, "icon": "cc-cc0-icon", "id": "cc0-1.0", "props": { "scheme": "spdx", "url": "https://creativecommons.org/publicdomain/zero/1.0/legalcode" }, "title": { "en": "Creative Commons Zero v1.0 Universal" } } ], "subjects": [ { "subject": "Gulf of Thailand" }, { "subject": "habitat" }, { "subject": "Irrawaddy dolphin" }, { "subject": "Orcaella brevirostris" }, { "subject": "spatial management" } ], "title": "Data from: Habitat modeling of Irrawaddy dolphins (Orcaella brevirostris) in the eastern Gulf of Thailand" }, "parent": { "access": { "owned_by": { "user": "90070" } }, "communities": { "default": "734b6452-1f40-4db0-b218-08ab1d568b7f", "entries": [ { "access": { "member_policy": "open", "members_visibility": "public", "record_submission_policy": "open", "review_policy": "open", "visibility": "public" }, "children": { "allow": false }, "created": "2020-02-04T14:03:17.992421+00:00", "custom_fields": {}, "deletion_status": { "is_deleted": false, "status": "P" }, "id": "734b6452-1f40-4db0-b218-08ab1d568b7f", "links": {}, "metadata": { "curation_policy": "The Dryad collection in Zenodo contains datasets mirrored from the Dryad Digital Repository. If you want your dataset to appear here, submit it through https://datadryad.org. No other datasets will be accepted.
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